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  <title>Create GMP number</title>
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 <body class="docs"><div id="layout">
  <div id="layout-content"><div id="function.gmp-init" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">gmp_init</h1>
  <p class="verinfo">(PHP 4 &gt;= 4.0.4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">gmp_init</span> &mdash; <span class="dc-title">Create GMP number</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.gmp-init-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>gmp_init</strong></span>
    ( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$number</code></span>
   [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$base</code><span class="initializer"> = 0</span></span>
  ] ) : <span class="type"><a href="class.gmp.html" class="type GMP">GMP</a></span></div>

  <p class="para rdfs-comment">
   Creates a GMP number from an integer or string. 
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.gmp-init-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">number</code></dt>

     <dd>

      <p class="para">
       An integer or a string. The string representation can be decimal, 
       hexadecimal or octal.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">base</code></dt>

     <dd>

      <p class="para">
       The base.
      </p>
      <p class="para">
       The base may vary from 2 to 36. If base is 0 (default value), the
       actual base is determined from the leading characters: if the first
       two characters are <em>0x</em> or <em>0X</em>,
       hexadecimal is assumed, otherwise if the first character is &quot;0&quot;,
       octal is assumed, otherwise decimal is assumed.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.gmp-init-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   GMP 数值<span class="type"><span class="type 资源">资源</span></span>.
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.gmp-init-changelog">
  <h3 class="title">更新日志</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>版本</th>
       <th>说明</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>5.3.2</td>
       <td>
        The <code class="parameter">base</code> was extended from 2 to 36, to
        2 to 62 and -2 to -36.
       </td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>


 <div class="refsect1 notes" id="refsect1-function.gmp-init-notes">
  <h3 class="title">注释</h3>
  <blockquote class="note"><p><strong class="note">Note</strong>: 
   <p class="para">
    To use the extended base introduced in PHP 5.3.2, then 
    PHP must be compiled against GMP 4.2.0 or greater.
   </p>
  </p></blockquote>
 </div>


 <div class="refsect1 examples" id="refsect1-function.gmp-init-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4078">
    <p><strong>Example #1 Creating GMP number</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$a&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">gmp_init</span><span style="color: #007700">(</span><span style="color: #0000BB">123456</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$b&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">gmp_init</span><span style="color: #007700">(</span><span style="color: #DD0000">"0xFFFFDEBACDFEDF7200"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 notes" id="refsect1-function.gmp-init-notes">
  <h3 class="title">注释</h3>
  <blockquote class="note"><p><strong class="note">Note</strong>: 
   <p class="para">
    It is not necessary to call this function in order to use integers or
    strings in place of GMP numbers in GMP functions (such as with
    <span class="function"><a href="gmp_add.html" class="function">gmp_add()</a></span>). Function arguments are automatically
    converted to GMP numbers, if such conversion is possible and needed, using
    the same rules as <span class="function"><strong>gmp_init()</strong></span>.
   </p>
  </p></blockquote>
 </div>

 
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